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Tiger 100 Pistons 63mm #489863
05/12/13 7:54 am
05/12/13 7:54 am
Joined: Apr 2012
Posts: 253
England
British Ironwork Offline OP
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British Ironwork  Offline OP
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England
Does anyone know if there are any qualitypistons available for the pre-unit Tiger 100? There's a few on the Bay of Doom with questionable heritage, but if I'm going to get some I'd rather they be fit for purpose.

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Re: Tiger 100 Pistons 63mm [Re: British Ironwork] #489864
05/12/13 8:12 am
05/12/13 8:12 am
Joined: Aug 2001
Posts: 7,026
scotland
triton thrasher Online content
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triton thrasher  Online Content
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scotland
What is on eBay? What do you think is wrong with them?

What do TMS, Tricor and Supreme say?


Amateur Loctite enthusiast.
Re: Tiger 100 Pistons 63mm [Re: British Ironwork] #489869
05/12/13 9:02 am
05/12/13 9:02 am
Joined: Apr 2012
Posts: 253
England
British Ironwork Offline OP
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British Ironwork  Offline OP
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England
There's a lot of rancor at the moment about pistons originating somewhat east of Gt Yarmouth being presented in Hepolite packaging.
While I have no problem with things like tool boxes, headlight shells and the like being produced in these exotic places, I am not convinced by the metallurgy behind the engine components. It is not a case of being xenophobic, I ride a 94 500 Bullet every day and nothing much has broke on that, but there is still a reasonable amount of QC backing their parts up.
I see on the Bay that some of the sellers show pistons on top of L.F.Harris boxes, I have never had an issue with Harris kit, and will go that route if nothing else is available. However, if someone like Wiseco or Omega makes them, which I can't find out, I'd rather go with them.

Cheers
Brian

Re: Tiger 100 Pistons 63mm [Re: British Ironwork] #489873
05/12/13 9:28 am
05/12/13 9:28 am
Joined: Dec 2004
Posts: 9,061
Scotland
kommando Online content
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Scotland
The current Hepolite pistons are rebadged Taiwanese pistons fitted with Hastings rings, the pistons have been available as Cycle craft for various engines for many years and only the rings caused problems so adding Hastings is an improvement. The practice of buying brands and labelling rubbish with the brand is sadly legal but in this case the sources are good but as you suggest are not true Hepolite. LF Harris are likely to have sourced their Pistons from cycle craft too so you need to factor in new rings if you use them.

Re: Tiger 100 Pistons 63mm [Re: British Ironwork] #489879
05/12/13 10:02 am
05/12/13 10:02 am
Joined: Aug 2001
Posts: 7,026
scotland
triton thrasher Online content
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triton thrasher  Online Content
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Posts: 7,026
scotland
Harris Pistons are Taiwanese. They're in my bike and there is nothing wrong with them. They're lighter than British Hepolite, so the engine might vibrate slightly differently, or it might not.

If you rebore with too little piston skirt clearance, your engine will seize. Nothing to do with Far Eastern Pistons, but it's something to look out for.


Amateur Loctite enthusiast.
Re: Tiger 100 Pistons 63mm [Re: British Ironwork] #489880
05/12/13 10:20 am
05/12/13 10:20 am
Joined: Apr 2012
Posts: 253
England
British Ironwork Offline OP
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British Ironwork  Offline OP
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Posts: 253
England
Cheers for that gents, if you're giving the pistons the thrashing that your name suggests TT then that's a good recommendation.
I'm guessing that the big players in the performance part game don't bother with niche markets like 60 year old British bikes.

Brian

Re: Tiger 100 Pistons 63mm [Re: British Ironwork] #489897
05/12/13 12:44 pm
05/12/13 12:44 pm
Joined: Aug 2001
Posts: 7,026
scotland
triton thrasher Online content
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scotland
I expect you can get racing forged pistons supplied or made too, if that's what you want.


Amateur Loctite enthusiast.
Re: Tiger 100 Pistons 63mm [Re: British Ironwork] #489903
05/12/13 1:39 pm
05/12/13 1:39 pm
Joined: Apr 2012
Posts: 253
England
British Ironwork Offline OP
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British Ironwork  Offline OP
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Posts: 253
England
No not at all, I would like to get 40bhp out of a pre unit Tiger 100, this is slightly lower than the figure quoted for the legendary "Red Seal" engines Triumph produced in '56. I just feel that they were producing this power on 9.5:1 Hepolites (E2884), it would be best to get as close to that original spec as I can.

Cheers
Brian


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